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Accounts Receivable, net
 3 Months Ended
Mar. 31, 2016
Receivables [Abstract]  
Accounts Receivable, net
Accounts Receivable, net
Accounts receivable, net, consists of the following: 
 
March 31,
2016
 
December 31,
2015
 
(in thousands)
Accounts receivable, gross
$
29,670

 
$
30,422

Less allowance for doubtful accounts
(1,278
)
 
(1,404
)
Total accounts receivable, net
$
28,392

 
$
29,018